Condensation product of the anthraquinone series and process of making same



1 give dyeings of various shades.

The following examples serve to illustrate Patented Nov. 19, 9 I i :1 OFFIC GEORG KRANZLEI N AND ROBERT SEDL MAYR, OF HOCHST-ON-THE-MAIN, GERMANY, 'AS- SIG-NORS TO GENERAL ANIL INE WORKS; INC., OENEW YORK, N. 'Y. A CORPORATIQN' OF DELAWARE CONDENSATION PRODUCT OF THE AN THRAQUINONE SERIES AND PROCESS OF MAKING SAME No Drawing. Application filed November 23, 1925, serial No. 70,986; and in Germany December 27, 1924.

The present invention relates to new condensation products of the anthraquinone series and process of making the same.

We have found that by causing an organic aoyl halide-to act upon dibenzanthronyl or upon the already cyclically closed dibenzanthrone in presence of an acid reacting condensing agent particularly aluminium chloride, new condensation products are obtainable which constitute valuable dyestufls and our invention, the parts being by weight:

1. One part of-dibenzanthronyl is vfinely ground with 10 parts of aluminium chloride and heated for a prolonged time at 120150 C. with 6 parts of benzoylchloride in an atmosphere of oxygen. The molten mass is decomposed in the usual manner by means of hydrochloric acid and then forms a bluishviolet powder which dissolves in solvents of high boiling point to a blue solution and forms bluecrystals. The color of its solution in concentrated sulfuric acid is similarto that of the dibenzanthrone, but when the soluv I tion of the new product in sulfuric acid is poured into water it coagulates to blue flakes, whereas the dibenzanthrone gives a violet precipitate; The dyestufl' so obtained prob ably is represented by the following formula:

nium chloride and oxalyl chloride in excess serving simultaneously as a solvent. Thus a greyish-green powder is obtained dissolving in sulfuric acid to a reddish-violet solution. On pouring the solution into water, green flakes separate therefrom. The vat prepared therefrom has a bluish-violet polor with a bluish-green bloom. and dyes I greyish-blue The dyestufl thus obtainable corremost probably to the following fortints. sponds mula If for the dibenzanthronyl is substituted dlbenzanthrone, similar dyestufi's are obtainable; In an analogous manner may be vused for instance phosgene, in which black dyestuffs are obtained.

Furthermore ride.

' instead of the above named acid halides other acid halides,

If in the above described process the em- I ployed oxygenatmosphere is replaced by a halogen, there are-obtained-more or less highly halogenated products, some of whichare more difiicultly reduced to-their leuco-compounds and give on cotton bluish-green to greenish-blue tints.

The reaction proceeds in such a rnanner that when using dibenzanthronyl there is at fifst formed dibenzanthrone. Therefore it makes no difi'erence for the reaction whether there is used as starting product dibenzanthrone or dibenzanthronyl.

We claim: 1. Process of preparing condensation products of the anthraquinone series which con sists in condensing at an elevated temperature a dibenzanthrone not substituted in the 'Bz2 B22 osition with an organic acvl halide in presence of an acid reacting condenslng agent.

' 2. Process of preparing-condensation products of the anthraquinone series which consists in condensing .at an elevated temperahire a dibenz anthrone not substituted in' the Bz2, Bz2' position with a benzoylhalide in presence of an' acid reacting condensing agentt 3. Process of preparing condensation products of the anthraquinone series which consists i-n condensing at an elevated temperature a dibenzanthrone not substituted in the B22, B22 position with an organic acylhalide in the presence of aluminium chloride.

4. As new products the vat dyestufis substantially identical with the -condensation products obtainable by condensing a dibenzanthrone not substituted in the Bz2, B22

position with an organic acylhalide in the with six parts of benzoylchloride at a tern prature of about 120-150 CQin the presence of ten arts of aluminium chloride and in an atmosp ere of oxygen.

' 7. As a new product the compound of the general formula: v

which dyes cot-ton from bluish-violet vat pure blue shades,

In testimony whereof, we aflfix our signatures. u v

- GEQRG KRANZLEIN.

ROBERT SED u YR. 

